--- title: "cat immune support — Niche Verdict: Skip it (47/100) | Amazon United States - Flapen" canonical_url: "https://flapen.com/amazon/research/us/pet-supplies/cat-immune-support" last_updated: "2026-07-10T01:37:12.937Z" locale: en meta: description: "a small market ($68K/yr) — cat immune support doesn't clear our bar today." "og:description": "a small market ($68K/yr) — cat immune support doesn't clear our bar today." "og:title": "cat immune support — Niche Verdict: Skip it (47/100) | Amazon United States - Flapen" --- Back to Flapen home # **cat immune support** **Skip it****47/100 ** a small market ($68K/yr) — cat immune support doesn't clear our bar today. **Market/yr** **$68K** **Growth (1y)** **+167.4%** **Products** **17** **Brands** **14** was 20 a year ago **Sellers** **16** **Price range** **$3.06–$30.84** **Returns** **0.1%** **Rating** **4.4★** **Skip it** Scored 47/100 across market size, growth, competition, quality gap, and returns. Market sizeGrowthCompetitionQuality gapReturns Market size **3** ×0.30 Growth **73** ×0.30 Competition **48** ×0.20 Quality gap **47** ×0.10 Returns **99** ×0.10 ## **Demand** Weekly Amazon search volume, last 104 weeks — +167.4% year over year. 1K747.5Spike '24Spike '25Prime Day '25Spike '26Jul '24Nov '24Mar '25Jul '25Nov '25Mar '26 ## **Seasonality** Monthly demand index across the year — 1.00 is average. JFMAMJJASOND No pronounced peak months · busiest ÷ quietest = 1.4× ## **Competition** - Pet Honesty28% - Vetoquinol15% - Coco and Luna11% - SANTKOL9% - TOMLYN8% - Pro Plan Veterinary Diets6% - Other (8 brands)23% The top 5 products take 58% of clicks — established leaders, but buyers still shop beyond them. 14 brands and 16 sellers compete here. **Brands** **14 **▼falling was 20 a year ago **Sellers** **16** **Top 5 brand share** **71%** #ProductBrandPriceRatingReviewsClick shareTrend 1 ![Cat Immune Support Lysine Allergy Relief & Immune Health Supplement for Cats with L-Lysine Colostrum Quercetin & Omega-3 Soothes Sneezing Runny Nose & Itchy Skin Chicken (30-Day Supply)](https://m.media-amazon.com/images/I/51DYQaPjwOL.jpg) [**Cat Immune Support Lysine Allergy Relief & Immune Health Supplement for Cats with L-Lysine Colostrum Quercetin & Omega-3 Soothes Sneezing Runny Nose & Itchy Skin Chicken (30-Day Supply)**](https://www.amazon.com/dp/B0C2B7F597) Pet Honesty$15.334.5★2,46121%▲rising 2 ![Vetoquinol Viralys - Lysine Supplement for Cats & Kittens - Supports Eye Wellness Respiratory Health & Immune Strength - Flavored Oral Powder for Easy Feeding & Daily Use - 100 Grams](https://m.media-amazon.com/images/I/41hozmb4g3L.jpg) [**Vetoquinol Viralys - Lysine Supplement for Cats & Kittens - Supports Eye Wellness Respiratory Health & Immune Strength - Flavored Oral Powder for Easy Feeding & Daily Use - 100 Grams**](https://www.amazon.com/dp/B000FULBT4) Vetoquinol$30.844.6★9,57710%▼falling 3 ![SANTKOL L-Lysine Supplement for Cats - Immune Support - 60ML Lysine for Feline Respiratory Sneezing Runny Nose Eye Function - Natural Cat Antibiotic Drops - Roast Chicken Flavor](https://m.media-amazon.com/images/I/51IN3wzYjEL.jpg) [**SANTKOL L-Lysine Supplement for Cats - Immune Support - 60ML Lysine for Feline Respiratory Sneezing Runny Nose Eye Function - Natural Cat Antibiotic Drops - Roast Chicken Flavor**](https://www.amazon.com/dp/B0DFGZCD2V) SANTKOL$20.674.5★1,5039%▲rising 4 ![L-Lysine for Cats 900mg - Immune Eye & Respiratory Support Powder](https://m.media-amazon.com/images/I/41AJZ3DBrEL.jpg) [**L-Lysine for Cats 900mg - Immune Eye & Respiratory Support Powder**](https://www.amazon.com/dp/B083QR6NMT) Coco and Luna$22.494.4★3,1709%▼falling 5 ![Tomlyn Immune Support Daily L-Lysine Supplement Fish-Flavored Lysine Powder for Cats and Kittens 3.5oz](https://m.media-amazon.com/images/I/41JE8ntYD0L.jpg) [**Tomlyn Immune Support Daily L-Lysine Supplement Fish-Flavored Lysine Powder for Cats and Kittens 3.5oz**](https://www.amazon.com/dp/B00BERPOP4) TOMLYN$20.294.6★5,4198%▼falling 6 ![Cat Multivitamin Crunchy Creamy Chews - Daily Cat Vitamins with Lysine Prebiotics Omega 3 Fish Oil - Cat Treats for Immune Support Skin Coat Digestion Heart + Joint Health (30-Day Supply)](https://m.media-amazon.com/images/I/519Wyc5oHIL.jpg) [**Cat Multivitamin Crunchy Creamy Chews - Daily Cat Vitamins with Lysine Prebiotics Omega 3 Fish Oil - Cat Treats for Immune Support Skin Coat Digestion Heart + Joint Health (30-Day Supply)**](https://www.amazon.com/dp/B0C3NKNYLD) Pet Honesty$14.274.7★5,4597%▼falling 7 ![Purina Pro Plan Veterinary Cat Supplements Multi Care Feline Supplement Digestive Probiotics for Cats Immune Support Cat Supplement - 30 ct. Box](https://m.media-amazon.com/images/I/41+cHcZNv7L.jpg) [**Purina Pro Plan Veterinary Cat Supplements Multi Care Feline Supplement Digestive Probiotics for Cats Immune Support Cat Supplement - 30 ct. Box**](https://www.amazon.com/dp/B0DSR2Z8RH) Pro Plan Veterinary Diets$27.404.6★6676%▼falling 8 ![Vetoquinol Viralys - Lysine Supplement for Cats & Kittens - Supports Eye Wellness Respiratory Health & Immune Strength - Flavored Oral Gel for Easy Feeding & Daily Use for Picky Eaters - 5oz](https://m.media-amazon.com/images/I/31LTQAqU4yL.jpg) [**Vetoquinol Viralys - Lysine Supplement for Cats & Kittens - Supports Eye Wellness Respiratory Health & Immune Strength - Flavored Oral Gel for Easy Feeding & Daily Use for Picky Eaters - 5oz**](https://www.amazon.com/dp/B00AMEBH06) Vetoquinol$24.494.5★11,2095%▼falling 9 ![Dr. Bills Feline Immune Support | Boosts Cat Immunity and Health with Colostrum Beta Glucan Turkey Tail Mushroom Zinc & Vitamin C | Powder Supplement for Cats of All Ages](https://m.media-amazon.com/images/I/41xWsEzH80L.jpg) [**Dr. Bills Feline Immune Support | Boosts Cat Immunity and Health with Colostrum Beta Glucan Turkey Tail Mushroom Zinc & Vitamin C | Powder Supplement for Cats of All Ages**](https://www.amazon.com/dp/B075HCGDXL) Dr. Bill's$18.154.2★4995%—flat 10 ![Nutramax Imuquin Immune Health Supplement for Cats with Astaxanthin and Beta Glucans 30 Sprinkle Capsules](https://m.media-amazon.com/images/I/41ZflW4AWwL.jpg) [**Nutramax Imuquin Immune Health Supplement for Cats with Astaxanthin and Beta Glucans 30 Sprinkle Capsules**](https://www.amazon.com/dp/B0FKPQSVSV) Nutramax Laboratories$19.104.3★1,0464%▲rising 11 ![Antibiotics for Cats Natural Antibiotic Pet Supplements Supports Immune & Cats Allergy Relief Cat Multivitamin UTI Drops for All Ages & Breeds of Cat Chicken Flavour - 2 Fl Oz / 1 Pack](https://m.media-amazon.com/images/I/51MXjjzS8jL.jpg) [**Antibiotics for Cats Natural Antibiotic Pet Supplements Supports Immune & Cats Allergy Relief Cat Multivitamin UTI Drops for All Ages & Breeds of Cat Chicken Flavour - 2 Fl Oz / 1 Pack**](https://www.amazon.com/dp/B0CNPPG95N) ALIVO$13.434.3★1,5874%▲rising 12 ![Felisyl L-Lysine Gel for Cats & Kittens (5oz) Immune System Respiratory & Eye Health Support. Reduces Sneezing Runny Nose & Watery Eyes. Daily Salmon-Flavor Supplement Made in USA (1 Pack)](https://m.media-amazon.com/images/I/416hY7iNOhL.jpg) [**Felisyl L-Lysine Gel for Cats & Kittens (5oz) Immune System Respiratory & Eye Health Support. Reduces Sneezing Runny Nose & Watery Eyes. Daily Salmon-Flavor Supplement Made in USA (1 Pack)**](https://www.amazon.com/dp/B00MO9SHBE) Felisyl$18.294.4★2,2124%▼falling 13 ![Purina ONE Plus Immune Support Purees with Real Chicken Lickable Cat Treats - 1.4 oz (Pack of 4)](https://m.media-amazon.com/images/I/41zfCi9AtlL.jpg) [**Purina ONE Plus Immune Support Purees with Real Chicken Lickable Cat Treats - 1.4 oz (Pack of 4)**](https://www.amazon.com/dp/B0G5T11P75) Purina ONE$3.064.4★502%▲rising 14 ![Multivitamin for Cats 4oz Powder - Immune Eye Skin & Heart Support](https://m.media-amazon.com/images/I/41-vgQUKo2L.jpg) [**Multivitamin for Cats 4oz Powder - Immune Eye Skin & Heart Support**](https://www.amazon.com/dp/B0CLMJ5SJF) Coco and Luna$22.504.2★7692%▲rising 15 ![VetriScience Lysine Immunity Health Chews 250 mg Lysine Plus Immune Supplement for Cats and Kittens with Allergies Sneezing Runny Nose and Watery Eyes Chicken 120 Count](https://m.media-amazon.com/images/I/41UNAX2bMiL.jpg) [**VetriScience Lysine Immunity Health Chews 250 mg Lysine Plus Immune Supplement for Cats and Kittens with Allergies Sneezing Runny Nose and Watery Eyes Chicken 120 Count**](https://www.amazon.com/dp/B002ALE9RM) VETRISCIENCE$18.514.1★11,8712%▼falling **~~Showing 15 of 17 — show all ~~** ## **Product shelf** All 17 tracked products in this niche. Top sellersNewestTrending [![Cat Immune Support Lysine Allergy Relief & Immune Health Supplement for Cats with L-Lysine Colostrum Quercetin & Omega-3 Soothes Sneezing Runny Nose & Itchy Skin Chicken (30-Day Supply)](https://m.media-amazon.com/images/I/51DYQaPjwOL.jpg)**Cat Immune Support Lysine Allergy Relief & Immune Health Supplement for Cats with L-Lysine Colostrum Quercetin & Omega-3 Soothes Sneezing Runny Nose & Itchy Skin Chicken (30-Day Supply)** Pet Honesty**$15.33**4.5★2,461 reviews](https://www.amazon.com/dp/B0C2B7F597) [![Vetoquinol Viralys - Lysine Supplement for Cats & Kittens - Supports Eye Wellness Respiratory Health & Immune Strength - Flavored Oral Powder for Easy Feeding & Daily Use - 100 Grams](https://m.media-amazon.com/images/I/41hozmb4g3L.jpg)**Vetoquinol Viralys - Lysine Supplement for Cats & Kittens - Supports Eye Wellness Respiratory Health & Immune Strength - Flavored Oral Powder for Easy Feeding & Daily Use - 100 Grams** Vetoquinol**$30.84**4.6★9,577 reviews](https://www.amazon.com/dp/B000FULBT4) [![SANTKOL L-Lysine Supplement for Cats - Immune Support - 60ML Lysine for Feline Respiratory Sneezing Runny Nose Eye Function - Natural Cat Antibiotic Drops - Roast Chicken Flavor](https://m.media-amazon.com/images/I/51IN3wzYjEL.jpg)**SANTKOL L-Lysine Supplement for Cats - Immune Support - 60ML Lysine for Feline Respiratory Sneezing Runny Nose Eye Function - Natural Cat Antibiotic Drops - Roast Chicken Flavor** SANTKOL**$20.67**4.5★1,503 reviews](https://www.amazon.com/dp/B0DFGZCD2V) [![L-Lysine for Cats 900mg - Immune Eye & Respiratory Support Powder](https://m.media-amazon.com/images/I/41AJZ3DBrEL.jpg)**L-Lysine for Cats 900mg - Immune Eye & Respiratory Support Powder** Coco and Luna**$22.49**4.4★3,170 reviews](https://www.amazon.com/dp/B083QR6NMT) [![Tomlyn Immune Support Daily L-Lysine Supplement Fish-Flavored Lysine Powder for Cats and Kittens 3.5oz](https://m.media-amazon.com/images/I/41JE8ntYD0L.jpg)**Tomlyn Immune Support Daily L-Lysine Supplement Fish-Flavored Lysine Powder for Cats and Kittens 3.5oz** TOMLYN**$20.29**4.6★5,419 reviews](https://www.amazon.com/dp/B00BERPOP4) [![Cat Multivitamin Crunchy Creamy Chews - Daily Cat Vitamins with Lysine Prebiotics Omega 3 Fish Oil - Cat Treats for Immune Support Skin Coat Digestion Heart + Joint Health (30-Day Supply)](https://m.media-amazon.com/images/I/519Wyc5oHIL.jpg)**Cat Multivitamin Crunchy Creamy Chews - Daily Cat Vitamins with Lysine Prebiotics Omega 3 Fish Oil - Cat Treats for Immune Support Skin Coat Digestion Heart + Joint Health (30-Day Supply)** Pet Honesty**$14.27**4.7★5,459 reviews](https://www.amazon.com/dp/B0C3NKNYLD) [![Purina Pro Plan Veterinary Cat Supplements Multi Care Feline Supplement Digestive Probiotics for Cats Immune Support Cat Supplement - 30 ct. Box](https://m.media-amazon.com/images/I/41+cHcZNv7L.jpg)**Purina Pro Plan Veterinary Cat Supplements Multi Care Feline Supplement Digestive Probiotics for Cats Immune Support Cat Supplement - 30 ct. Box** Pro Plan Veterinary Diets**$27.40**4.6★667 reviews](https://www.amazon.com/dp/B0DSR2Z8RH) [![Vetoquinol Viralys - Lysine Supplement for Cats & Kittens - Supports Eye Wellness Respiratory Health & Immune Strength - Flavored Oral Gel for Easy Feeding & Daily Use for Picky Eaters - 5oz](https://m.media-amazon.com/images/I/31LTQAqU4yL.jpg)**Vetoquinol Viralys - Lysine Supplement for Cats & Kittens - Supports Eye Wellness Respiratory Health & Immune Strength - Flavored Oral Gel for Easy Feeding & Daily Use for Picky Eaters - 5oz** Vetoquinol**$24.49**4.5★11,209 reviews](https://www.amazon.com/dp/B00AMEBH06) ## **Reviews** What buyers praise and complain about, mined from review topics. ### **What buyers love ** **Pet Friendly**23% *“My cat approved”* **Taste-Overall**14% *“My cat absolutely LOVES the taste”* **Quality-Overall**9% *“Excellent product”* **Flavor**9% *“Strong flavor”* **Value For Money**6% *“Good Value”* **Ease Of Use**5% *“Easy to administer”* **Soothing/Teething**5% *“Helps kittens”* **Allergies**4% *“Helps with allergies”* **Smell**2% *“it doesnt smell bad like other brands I tried”* **Ease Of Chewing/Swallowing**2% *“The chewability is great as well”* ### **What buyers complain about ** **Allergies**10% *“itching a lot”* **Value For Money**10% *“It's a little expensive”* **Smell**9% *“It does have a fishy smell”* **Indigestion**8% *“Causes vomiting”* **Taste-Overall**6% *“The one cat that loved the taste isn't even the cat that I needed this for”* **Functionality-Overall**5% *“It did not work for my cat”* **Ingredients-Overall**4% *“The new formula is terrible”* **Flavor**3% *“my cat just doesn't seem to care for the chicken flavor”* **Size-Overall**3% *“The Bad: The Darn BAG is SO SMALL”* **Ease Of Use**3% *“I am unable to use it”* #### **Top return reasons**- Functionality-Overall21% - Advertised Vs Actual Product15% - Leak-Proof13% - Flavor9% - Indigestion5% - Defective Material/Parts5% - Smell5% - Value For Money4% - Ingredients-Overall4% - Ease Of Use3%